INDEX. 503 
to be affeCted by heat, impregnates the rocks in many 
parts of Labradore, p. 375. Pointed rods of copper 
recommended for conductors for the fecurity of build- 
ings, p. 403. Plates of copper recommended inftead 
of electrical chains for (hips, p. 412. Copper filt ered, 
its condo Cling power, p. 41 5. 
Cork, eledfrified by cutting or filing, p.417. 
Coventry , account of a woman accidentally burnt to death- 
there, p. 340. 
Crofs-wiresy of telefcopes, method of improving, p. 105. 
Curtis, lieutenant Roger, his account of the country of 
Labradore, p. 372. His draught of that country, 
preferable to any before made, ibid. His fuperior ad- 
vantages for the executing it, p. 373* 
Curtis, Mr. William, his account of the 50 Chelfea 
plants for 1773, P- 3 Q2 * 
D. 
Darwin, Dr. his experiments on animal fluids, p; 345. 
Davis’s Inlet, navigation of, extremely hazardous, p. 373; 
Mafles of ice there of prodigious magnitude, very 
dangerous to (hips in ftorms, or thick weather, p. 373, 
374. From whence they ccme, and of what formed,, 
ibid. Their appearance on the coaft-a mark of the 
approach of fummer, ibid. 
Deafnejs, experiments, to remove,, by the cupping glafs, 
P- 349 - 
Denfity, and preffure of the atmofphere, how to be de- 
termined, p.261 — 267. Denfi ties at- different heights 
reprtfented by the ordinates of a logarithmic curve, 
p. 231. of different logarithmics at different times,, 
p. 249. At the fame, time by parts of different loga~- 
rithmics at different heights, if the temperature of the 
whole atmofphere be not uniform, p. 251 — 254. 
Derg, Lough, the Gillaroo trout found there,, p. 120.- 
